Diesel engine



Jan. 26, 1943.

F. ARENA DIESEL ENGINE Filed Nov. 3, 1941 2 Sheets-Sheet l I fla l/ 2Araiza IN VEN 0R.

A'I'I'CIRNEYB Jan. 26, 1943. ARENA I 2,309,434

DIESEL ENGINE Filed Nov. 3, 1941 2 Sheets-Sheet 2 5e? INVENTOR, flankArena.

Patented Jan. 26, 1943 UNITED STATES PATENT OFFICE DIESEL ENGINE FrankArena, Elba, N. Y.

Application November 3, 1941, Serial No. 417,707

2 Claims.

My invention relates to internal combustion engines and has among itsobjects and advantages the provision of an improved Diesel engine.

An object of my invention is to provide a Diesel engine of the two-cycletype, wherein opposed pistons are connected with a crosshead toeliminate side thrust on the pistons, in which the engine is simple inconstruction and embodies relatively few parts so fashioned as tofacilitate assembly and repair, and in which the engine is designed tooperate efliciently and economically in the matter of fuel consumption.

In the accompanying drawings:

Figure 1 is a longitudinal sectional view of an engine in accordancewith my invention;

Figure 2 is a sectional view taken along the line 2-2 of Figure 1; and

Figure 3 is an enlarged sectional view taken along the line 3-3 ofFigure 1.

In the embodiment selected to illustrate the invention, two opposedpistons II) are connected as a unit through the medium of rods I2secured to a crosshead pin l4 through the medium-of a bolted couplingI6. Each piston I operates in a. cylinder I8, the cylinders beingarranged in axial alignment and bolted at 20 to a casing guide 22. Thiscase is made up of two sections 24 fixedly secured in a unitarystructure by bolts 26.

Each cylinder I8 is provided with a conventional fuel injection nozzle28 communicating with a precombustion chamber 30 having communicationwith its respective cylinder. Conventional fuel injection pumps 32 areprovided for the nozzles 28, which pumps are mounted on a gear case 34projecting from one side of the casing guide 22. A shaft 36 is rotatablymounted in the gear case 34 and is provided with a cam 38 which operatesthe respective pumps 32.

To the shaft 36 is secured abevel gear 40 meshing with a bevel gear 42keyed to a shaft 44. Rotation is imparted to the shaft 44 through themedium of a bevel gear 46 keyed to the shaft and meshing with a bevelgear 48 keyed to a shaft 50 provided with a bevel gear 52 meshing with abevel gear 54 keyed to the crankshaft 56.

Reciprocatory motion of the piston stem transmits rotary motion to thecrankshaft 58 through the medium of two arms 58, see Figure 2, extendingthrough slots 60 in a crankcase 62 provided with crankshaft supportingbearings 64. Each arm 58 is connected with a crankpin 66 through themedium of a bearing 68, as well as with the crosshead pin I4 through themedi v to the other by bolts H2.

um of bearings 10. Two walls of the casing guide 22 are provided withslots I2 for guiding the crosshead pin I4 in its reciprocatory travel,which crosshead pin is provided with bearings I14 tguidably engaging thewalls of the respective s o s.

Each cylinder head 16 is provided with an annular flange 18 within whichis fitted a cage having a passage 82 communicating with its respectivecylinder I3. The cages 80 are provided with valve seats 84 for coactionwith exhaust valves 86 biased to a closed position by springs 88. Eachcage 80 is provided with a guide 90 for the valve stem 92, and the cageis fixedly but detachably secured to its respective annular flange 18 bybolts 94 extending through openings in the cage flange 96 and threadedinto the annular flange I8. Thus the valves 86 may be removed byunloosening the cage 80 and pulling the cages from the annular flanges.Gaskets 98 are provided for effecting a sealed condition between thecages 80 and the annular flanges 18.

One of the cylinder heads I6 is bolted at I00 to the upper cylinder I8of Figure 2 and the lower cylinder head I6 comprises one wall of thecrankcase 62, the lower cylinder I8 being secured to this cylinder headI6 by bolts I02.

In Figures 1 and 3, a cam I04 is secured to the shaft 36 for actuatingrods I06 which operate rocker arms I08 acting on the valve stems 92.Figure 3 illustrates the gear housing 34 as comprising sections IIOfixedly secured one Each section H0 is cast integrally with one of thesections 24.

Each cylinder I8 is provided with a port H2 in its wall, which port hascommunication with the interior of the cylinder at its bottom end and atan intermediate point located to communicate with the space between thepiston and the crosshead when the piston is in its lower position, asillustrated in connection with the upper cylinder of Figure 1. Eachcylinder is provided with an air intake valve H4 biased to a closedposition by a spring I I6. These valves open as their respective pistonsprogress in their compression strokes to fill the cylinder spaceunderneath the pistons with air. The air is compressed as the pistonsprogress on their power stroke and is admitted to the combustionchambersas the pistons approach the ends of their power stroke. Thus thecompressed air is delivered forcibly into the respective combustionchambers to aid in scavenging the chambers, as well as admitting airthereto which is necessaryfor combustion purposes.

Without further elaboration, the foregoing will so fully illustrate myinvention, that others may, by applying current knowledge. readily adaptthe same for use under various conditions of service.

I claim:

i. A Diesel engine of the two-cycle type comprising opposed cylindersarranged in axial alignment, a casing guide fixedly connecting saidcylinders one with the other, said casing guide being provided withslots, pistons slidable in said cylinders, a crosshead member extendingthrough said slots and slldably guided thereby, said pistons beingfixedly connected with said crosshead member, an air inlet valvecommunieating with said cylinders andwith said casing guide, saidcylinders being provided with air passages for delivering air compressedby the respective cylinders to their combustion chambers upon completionof the power strokes of the means for delivering fuel to theprecombustion chambers, a cam on said shaft for actuating said fuelinjection means, exhaust valves, means operatively connecting theexhaust valves with said shaft, a crank shaft, arms connecting saidcrosshead member with said crank shaft, and

gear means operatlvely connecting said crank shaft with saidfirst-mentioned shaft.

2. The invention described in claim 1 wherein said cylinders are boltedto said casing guide, and wherein said arms are located exteriorly ofsaid casing guide. 1

FRANK ARENA.

